Coating strip of cavity surface of semiconductor laser and preparation method thereof
A technology of lasers and semiconductors, applied in semiconductor lasers, structural details of semiconductor lasers, lasers, etc., can solve problems that affect laser loss, life and stability, and are prone to "shadows" to improve stability and service life. The effect of the "shadow" effect
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[0023] Example 1: see Figure 1~Figure 4 As shown, a semiconductor laser cavity surface coating sidebar is used to separate two laser bars when the laser bar 2 is coated, the coating film sidebar 3 is a long strip with a convex cross section, and the coating film sidebar 3 The width is shorter than the width of the laser bar 2 .
[0024] In the first embodiment, the semiconductor laser is a GaN-based semiconductor laser, the cavity length of the coated cavity surface is 600um, and the bar length of the semiconductor laser is 9.6mm.
[0025] The preparation method of the semiconductor laser cavity surface coating sidebar includes the following steps:
[0026] (1) Select a Si sheet as the substrate for preparing the coated accompaniment;
[0027] (2) On one surface of the substrate in step (1), 5 grooves 4 with a depth of 40um and a width of 150um are processed every 550um;
[0028] (3) The substrate obtained in step (2) is cleaved into a coated sprung billet along the axial ...
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